664235230 has 16 divisors (see below), whose sum is σ = 1202537664. Its totient is φ = 264157600.

The previous prime is 664235207. The next prime is 664235263. The reversal of 664235230 is 32532466.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 664235192 and 664235201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190246 + ... + 193705.

It is an arithmetic number, because the mean of its divisors is an integer number (75158604).

Almost surely, 2^664235230 is an apocalyptic number.

664235230 is a deficient number, since it is larger than the sum of its proper divisors (538302434).

664235230 is a wasteful number, since it uses less digits than its factorization.

664235230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384131.

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 664235230 is about 25772.7613964821. The cubic root of 664235230 is about 872.5171432006.

Adding to 664235230 its reverse (32532466), we get a palindrome (696767696).

The spelling of 664235230 in words is "six hundred sixty-four million, two hundred thirty-five thousand, two hundred thirty".